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6 Sheets-Sheet 1..

(No Model.)

B. MATTHEWS.

GOVERNOR FOR STEAM ENGINES.

No. 351,188. Patented Oct. 19, 1886.

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(No Model.) 6 Sheets-Sheet 2.

R. MATTHEWS. I

GOVERNOR FOR STEAM ENGINES.

Patented Oct. 19, 1886.

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6 Sheets-Sheet 3.

(No Model.)

R. MATTHEWS. GOVERNOR FOR STEAM ENGINES.

Patented Oct. 19,1886.

(No Model.) 6 Sheets-Sheet 4.

R. MATTHEWS.

GOVERNOR FOR STEAM ENGINES.

N0. 351,188. Patented Oct. 19, 1886.

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6 Sheets-Sheet 5. R. MATTHEWS.

GOVERNOR FOR- STEAM ENGINES. No. 351,188.

Patented Oct. 19, 1886.

(No Model.) 6 Sheets-Sheet 6.4 R. MATTHEWS.

GOVERNOR FOR STEAM ENGINES. No. 351,188. Patented Oct. 19, 1886.

UNITED STATES PATENT Erica.

ROBERT MATTHEWVS, OF GREEN BANK, HYDE, COUNTY OF CHESTER, ENGLAND.

GOVERNOR FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 351,188, dated October19, 1886.

Application filed June 29, 1886. Serial No. 206,628.

To all whom it may concern:

Be it known that I, ROBERT MATTHEWS, a citizen of England, residing atGreen Bank, Hyde, county of Chester, England, have invented a new anduseful ImprovementinGovernors for Steam-Engines, of which the followingis a specification.

My invention relates to an improved construction of governors forsteamengines, whereby a praeticallyconstant speed is maintained,notwithstanding considerable variation either in the load on the engineor in the pressure of the steam.

The invention consists, mainly, in actuating, by means of the sleeve ofan ordinary centrifugal governor, alever carrying ascrew-spindle, onwhich is a screw nut that is connected either to the throttle-valve orto the trip-gear or other expansiongear of the engine, which screwspindle, by means of suitable gear, receives rotary motion in onedirection or the other from the rotation of the governor-sleeve wheneverthe speed of the engine falls below or rises above the normal, so thatat the same time that the said lever is directly moved by the verticalmotion of the governor-sleeve, so as to actuate the throttle-valve orexpansiongear, the nut on the screw-spindle is shifted relatively to thelever, so as to considerably increase its action.

The above-described mechanism may be variously arranged for carrying outthe object of my invention. I will proceed to describe severalarrangements with reference to the accompanying drawings.

Figure 1 shows a front elevation of one arrangement. Fig. 2 shows asideview, and Fig. 3 a sectional plan.

On the spindle A, carried by the bracket B of the governorpedestal, isfixed, first, the forked lever O, that is pivoted to thegovernor-sleeve, and, secondly, the lever D, carrying the screwedspindle E, capable of revolving in bearings thereon. The screwed spindlehas upon it ascrewed nut, F, towhich is pivoted the rod G, that actuatesthe throttle-valve or trip-gear or other expansion-gear, and on itsupper end is fixed a worm-wheel, H, gearing with a worm, 1,011 aspindle, J,

(No model.) Patented in England January 1, 1886, No. 44.

carried by a lever, K. This lever is mounted loose on the spindle A, andcarries at one end a roller, L, situated between the flanges M M on thegovernor-sleeve, there being a small amount of play between the rollerand flanges. The axis of the roller L has a worm, N, gear ing with aworm-wheel, O, on the other end of the spindle J. The lever K has acounterweight, P, at its other end, to balance the weight of the rollerL, and it is held in the middle position, shown by means of a spring, Q,attached to the bracket B and bearing on its under side.

Assuming the position of the governorsleeve shown on the drawings to bethat corresponding to the normal speed of the engine, it will be seenthat when in that position its flanges are not in contact with theroller L, and consequently,the latter not being rotated thereby, nomotion is imparted to the screwspindle E. \Vhen, however, the speed ofthe engine drops, the governor-sleeve, in dropping, will bring its upperflange into frictional contact with the disk, and will cause this torevolve, so that at the same time that the lever D is moved toward orinto the position D by the lever O, thereby actuating the throttlevalveor expansion-gear so as to admit more steam, the screwspindle is alsorotated, so as to cause the nut F to travel toward its lower end, and bythus effecting a greater backward mot-ion of the nut F and rod G thanwould be the case if the rod were pivoted to a fixed point on the lever,a corresponding increased action of the governor on the throttle-valveor expansion-gear will be effected. On the speed of the engineincreasing again the motion imparted to thescrewspinnle will stillcontinue in the same direction,-although the lever D will be moved backtoward its middle position by the rise of the governorsleeve, andconsequently the downward motion of the nut F will continue until thegovernor-sleeve has again arrived at its normal position shown,whereupon the contact of the flange M with the roller L will cease, andthe nut F will then remain in the position into which it has been moveduntil it is again shifted by a change of speed of the engine.

When the speed of the engine rises above the normal, the governor-sleevein rising above the middle position will effect the rotation of thespindle E in the contrary direction to that described, so that at thesame time that the lever D is moved toward the position D the nut F willbe screwed upward, and cgnsequently will also to a certain extentincrease the forwardmotion of rod G, and therefore also its action onthe valve-gear. When the speed of the engine has risen to such an extentas to bring the lever into the position D in which it stands at rightangles to the rod G, it will be seen that the upward movement of the nutwill have no effect in varying the position of the valve-gear. Thescrew-thread is stopped short at some distance from each end of thespindle E, so that the continued rotation thereof when the nut hasreached its extreme position in either direction, will only cause thenut to run off the screw, and thus prevent any damage to the mechanism.On the spindle being rotated in the contrary direction, owing to achange of speed, the nut will re-euter the screw-thread of the spindle,being aided in this, when inthe bottom position, by aspring, R, pressingit upward.

The rod G is generally of such a length between the governor and thevalve'gear that the angling thereof in theextreine positions of the nutwill practically not affect the abovedescribed action; but in caseswhere the rod would have to be of comparatively short length any effectsof its angular position may be avoided by forming the lever D with acurved slot in which the nut F would slide, and by leaving the lower endof the screwspindle free, with its upper end carried in a pivoted orball-and-socket bearing. Thus thecurvature of the slot would cause thenut when being screwed up or down to have its position varied so as tocompensate for the angular position of the rod G. Fig. 10 shows such anarrangement, the curvature of the slot D, in which the nut F works,being made as an are having a radius equal to the length oftheoonnecting-rod G. The position of the frictionroller L upon its axismay be made adjustable by means of a screwor other device, so that byshifting it nearer to or farther from the axis .of the governor-spindlethe relation between the speed of rotation of the governor and that ofthe screw-spindle may be varied.

Figs. 4and 5 show an elevation and section of a modification in whichthe lever D and screw-spindle E are arranged horizontally, the rod G foractuating the valve-gear being directed upward. The rotary motion isimparted to the screw-spindle E from the roller L through spindle J,worm I, worm-wheel H on spindle A, and worm and worm-wheel H and I, thelever 0 being mounted with its boss loose on the spindle A, and beingconnected rigidly with lever D. I 6 The several parts are otherwise ofthe same B, in which is a spring, Q, holding the roller .rangementat'Fig. 6 as applied to a throttleconstruction as above described, andare indicated by the same letters of reference.

In the modification shown at Figs. 6 and 7 the lever K, carrying thefriction-roller L, is cranked, so as to bring the axis of the rollerinto a position with its worm N, in gear'with a worm-wheel, O, on thespindle A, which in this case is rotatable in its bearings on thebracket 13, and carries a bevel-pinion, S, gearing with a bevel-wheel,T, on the screw-spindle E. 'Thelever 0, connected to the governorsleeve,in this case works loose on the spindle A, and has its one limb fixed toor formed in one with the boss of the lever D, which also works loose onA. Figs. 8 and 9 show a modification of this arrangement, in which thefriction-roller L is carried by a bracket, K, in place of a lever, thebracket having a stem, K, sliding in a socket, B, in the bracket 8 inthe middle position. The axis of the 5 roller imparts motion bybevel-gearing U V to an axis, WV, also carried by the bracket K, andwhich imparts motion by bevel-gearing X Y to the spindle A, having aworm, Z, in gear with the worm-wheel H on the screwspindle E. Fig. 11shows the first-described arrangement of the apparatus as applied to thetrip-gear of known construction for expansion-valves, and Fig. 12 showsthe arvalve. I

' Fig. 13 shows an elevation, and Fig. 14: a plan, of an arrangement inwhich the lever D and screw-spindleE are arranged as an intermediategear separate from the governor, which in this case is made to actuatethe lever D through the levers and rods e e e 6 while the screw-spindleis actuated by a separate sleeve, with flanges M M on the lower end ofthe governor-spindle, the friction-roller L being carried by a lever, K,with balanceweight I, as before; but the motion of the roller isimparted to the screw-spindle through a pulley, a, on: the axis of theroller L, and endless cord-b, passing over a pulley, c, the axis ofwhich drives the screw-spindle by bevel-gear cl.

Having thus described the nature of my invention and the best means Iknow for carrying the same into practical effect, I claim- 1. Incombination with the sliding sleeve of a governor, a lever carrying ascrew-spindle, which is rotated in one direction or the other byafriction-roller situated between two flanges 1 20 on thegovernor-sleeve, so that a screw-nut upon the'said-spindle connected tothe valvegear of the steam engine, in being moved up or down upon thescrewspind-le at the same time that the lever is moved by the governor,{25 effects an increased action upon the valvegear, substantially asherein described.

2. The combination, with the governorsleeve provided with flanges M M,of the friction-roller L, carried by lever or bracketK, :3

subscribing witnesses, this 15th day of June, IO A. D. 1886.

ROBERT MATTHEWS.

W'itnesses:

ARTHUR B. COWLEY,

Hyde. G. T. BILLINGS,

Godley.

